Taxon Report

Lewisia cotyledon (Wats.) Rob. var. heckneri (Mort.) Munz

Heckner's lewisia

Print Report

Taxon Summary

Lewisia cotyledon var. heckneri, commonly known as Heckner's lewisia, is a perennial herb in the Montiaceae that is found only in California. It occurs within Lower montane coniferous forest, growing at elevations from 225 to 2100 meters. Lewisia cotyledon var. heckneri is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

Classification


Scientific Name:	Lewisia cotyledon (Wats.) Rob. var. heckneri (Mort.) Munz
Common Name:	Heckner's lewisia
Family:	Montiaceae
Element Code:	PDPOR04052
USDA Plants Symbol:	LECOH
Synonyms/Other Names:

Ecology and Life History


Lifeform:	perennial herb
Blooming Period: (Apr)May-Jul	(Apr)May-Jul
Elevation:	225-2100 (740-6890)
General Habitats:	Lower montane coniferous forest
Microhabitat:
Microhabitat Details:

Conservation Status


CA Rare Plant Rank:	1B.2
Global Rank:	G4T3
State Rank:	S3
State List:	None
Fed List:	None
Other Status:	BLM_S; SB_UCSC
CRPR Changes:

Occurrence Data from the CNDDB


Total Occurrences:	41
Element Occurrence Ranks:
Excellent (A)	4
Good (B)	7
Fair (C)	2
Poor (D)	0
None (X)	0
Unknown (U)	28

Location


California Endemic: True
California Counties and Islands: Name (Code)
Humboldt (HUM), Shasta (SHA), Siskiyou (SIS), Trinity (TRI)
Quads: Name (Quad Code)
Bollibokka Mtn. (4012282), Boulder Peak (4112351), Caribou Lake (4112218), Carrville (4112216), Condrey Mtn. (4112288), Dedrick (4012371), Del Loma (4012373), Denny (4012384), Happy Camp (4112374), Hayfork Bally (4012362), Helena (4012372), Hoosimbim Mtn. (4012258), Huckleberry Mtn. (4112363), Ironside Mtn. (4012374), Jim Jam Ridge (4012383), Junction City (4012361), Mt. Hilton (4012381), Preston Peak (4112375), Rush Creek Lakes (4012278), Siligo Peak (4012288), Thompson Peak (4112311), Thurston Peaks (4012382), Weaverville (4012268), Weitchpec (4112326), Whisky Bill Peak (4112215)

Threat List Data from the CNDDB


Threat List Total:	6
EOs with Threat Listed:	Total EOs	% of EOs
	11	27 %
Road/trail construction/maint.	5	12%
Foot traffic/trampling	2	4%
Logging	2	4%
Mining	1	2%
Other	1	2%
Recreational use (non-ORV)	1	2%

Notes



Range overlaps with other varieties; identification difficult.
Threats:
Possibly threatened by road widening and recreational activities.
Taxonomy:

Selected References

Lewisia cotyledon var. heckneri profile for potential Species of Conservation Concern evaluation (2018)

USFS Potential Species of Conservation Concern Profile

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].